bisecting fixing commit since e0f8b8a65a473a8baa439cf865a694bbeb83fe90
building syzkaller on 5d7b90f1af2e3bf33992b75e7fcf0bab6bf49bd6
testing commit e0f8b8a65a473a8baa439cf865a694bbeb83fe90
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 85c2e355617c32ada71f42df16057495dc63edc3c788aff928cf380034bd3fa6
run #0: crashed: possible deadlock in pty_write
run #1: crashed: possible deadlock in console_unlock
run #2: crashed: possible deadlock in console_unlock
run #3: crashed: possible deadlock in pty_write
run #4: crashed: possible deadlock in console_unlock
run #5: crashed: possible deadlock in console_unlock
run #6: crashed: possible deadlock in pty_write
run #7: crashed: possible deadlock in console_unlock
run #8: crashed: possible deadlock in console_unlock
run #9: crashed: possible deadlock in console_unlock
run #10: crashed: possible deadlock in console_unlock
run #11: crashed: possible deadlock in console_unlock
run #12: crashed: possible deadlock in pty_write
run #13: crashed: possible deadlock in console_unlock
run #14: crashed: possible deadlock in console_unlock
run #15: crashed: possible deadlock in pty_write
run #16: crashed: possible deadlock in console_unlock
run #17: crashed: possible deadlock in pty_write
run #18: crashed: possible deadlock in console_unlock
run #19: crashed: possible deadlock in console_unlock
testing current HEAD 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: eeda1e17cb2db630c703f274070d1ac2c2383c6c1b545c07bb596fa3ee4ef423
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m42.647557879s (build: 22m0.410675334s, test: 6m42.704590416s)
the crash still happens on HEAD
commit msg: Linux 4.14.258
crash: unregister_netdevice: waiting for DEV to become free
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1